Metal tread attachment for tires.



Y, TAMAKI.

METAL TREAD ATTACHMENT FOR TIRES.

APPLICATION FILED JAN.20. 1917.

INVENTOR 563.1 Tamajtz AT 77x5.

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'YOSJI. TAMAKIE, 0F nos ANGELES, CALIFORNIA.

"METAL TEEAQQ A'ITACHlVIEHT FOB TIE/E52.

To all whom it may concern Be it known that I, Yosr TAMAKI, a suhject of the Emperor of Japan, residing at Los Angeles, in the county of Los Angeles and State of California, have invented new and useful Improvements in lateral Tread Attachments for Tires, of which the follow ing is a specification.

This invention relates to a traction wheel for motor vehicles and particularly pertains to a detachable tractor tire.

lit is the principal object .0? this invention to provide a detachable tractor tire for use in connection with pneumatic tires of motor vehicle wheels and the like, thus permitting a vehicle equipped with pneumatic tires to be readily adapted for heavy hauling and provided with additional tractive surface and grips by which the Wheels will more readily cling to the road-lied.

Another object. of this invention is to pro vide auxiliary traction tires which may he readily adapted for use upon pneumatic tires and which are so constructed as to re quire hut slight adjustment in order to rigidly secure them in place. It is a further object 01. this invention to provide a traction tread which is simple in construction, may be easily manutacturerl. and is formed of parts of simple design.

Other objects will appear hereinafter.

T he invention is illustrated, by way of example, in the accompanying drawings in which:

Figure l. is a view in side elevation illustraiing a wheel and pneumatic tire as equipped with the detachable tractor tread.

Fig". 2 is an enlarged view in transverse section illustrating the construction of the tractor tread and its manneroi mountii'ig; upon a pneumatic tire.

Fig. 3 is a view in perspective illustrating the tractor tread as rlisassociate' from the Wheel.

Fig. 4 is a View in longitudinal section as seen along theline ll. of Fig. 3 and illustrates the adjustable joint of the tractor tread.

Referring}: more particularly to the drawings, 10 indicates a wheel, here shown as of the artillery "type. This wheel fitted with an annular telly 11 upon which is suitably mounted a pneumatic tire 12. The open matie tire is oi common construction and is adapted to hear upon the road-Way under Specification of Letters liatent. Patented H gh, 1 36, 1918,, Application filed January 20, 1917.

Serial Ito. l lSttlS.

ordinary circumstances. However, when additional traction desired, a demountahle tractor tread l l: positioned over the tire and around. the wheel.

The tractor tread is formed with an annular transversely tlat hand 15. This member is constructed of a single sheet of metal which extends entirely around the tire and is formed. with its contiguous ends slidingly overlapping so that the device may be ad justed to worn tires. The overlappingend portion 16 is formed upon one end of the hand 15 and is disposed to overlap the other end of the hand along its outer face. Clamp ing bolts 17 and 18 are secured to this'overlapping" end portion and extend through slotted openings 19 and 20 in the underlapping end of the hand. These bolts are pro vidcd with nuts which insure that the ends order to'incrcase the traction of the attach inent a series of cleats 24 is disposed around the outer periphery of the tire hand. These cleats are here shown as channelsectien and as mounted at various angles to eaclrother.

When a. vehicle requires additional true tion over that normally provided by its pneumatic tires, the tractor treads i i are mounted upon the tires, as shown in Fig. 1 of the drawings. Thi is done by slightly deflating the tires to permit the hand 15 to pass over the outer periphery thereof, after which the tire is re-intlated and. its tread portion caused to he distended. and become seated within the channel 23 between the rings 2i and When the hand is in proper position upon the tire, the holts 17 and 18 are locked in a manner to hold the attachment rigidly and prevent its creeping when the wheel rotates. lit i evident that during: the rotation ol the wheel the cleats 24c will engage the soil over which the vehicle is pa ssing and will provide additional tractive etlort.

lit will thus he seen that the tractor tread here disclosed is simple in its construction and may be readily mounted in position and removed therefrom.

\Vhile I have shown the preferred e0nstruetion of my tractor tread as now known to me, it will be understood that various changes in the combination, construction and arrangement of parts may be made by those skilled in the art without departing from the spirit of my ii'n-ention.

I claim:

In a metal tread attachment for tires, the combination with a pneumatic tire, of an air nular flat tire band eireuniseribing the periphery of the tire and extending outwardly at opposite sides of the tire to form a wide tread surface of greater width than the width of the tire; the ends of said band overlapping; each other; and clamping bolts secured through the outer overlapping end of the band and extending inwardly through eircuniferentially arranged slots formed through the inner overlapping end of the band whereby the circumferential length of the band may he adjustably deterinii'ied.

ln testimony whereof I have signed my name to this specification.

YOSI TiU-IAKI. 

